Watch: Donald Trump offers $5M if Obama releases records

NEW YORK -- Donald Trump has a deal for President Barack Obama -- if he releases his college and passport records, the New York real estate mogul will contribute $5 million to a charity of Obama's choice.

Trump made the announcement Wednesday, which he teased would be a "bombshell," in a video posted (see the full video at the bottom of this story) to his Twitter account. He called Obama "the least transparent president in the history of this country," and said the deal would end voters' questions.

Trump has endorsed Republican Mitt Romney in the presidential race. Trump drew broad publicity last year for questioning whether Obama was born in the U.S. and eligible to be president, forcing Obama to release his long-form birth certificate.

In the video, Trump said he was proud to have pushed Obama to release the birth certificate or quote -- "whatever it may be."